Okay, let's just get to the chase. Here we have Welcome Collection for those of you who either bought or kept-ownership-thru the s&box into its First Release.

https://sbox.game/perkedel/welcome_recommendation

Enjoy.
It contains everything you need to get a gist of what s&box is about. We got Games, Assets, and Stuffs, for both Gameplay and your own development with s&box editor.
We also made sure Slops are removed from it. Let us know if we missed one.

Also, here's Steam Guide about it.

steamcommunity.com
Steam Community :: Guide :: First Timers Recommended Stuffs to try
Okay you had bought / kept-the-ownership-thru the s&box. Now what? What do I play? And I want to develop, what do I use? We got Playlist for you! You should check this out....